- java.lang.Object
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- javax.crypto.spec.OAEPParameterSpec
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- All Implemented Interfaces:
AlgorithmParameterSpec
public class OAEPParameterSpec extends Object implements AlgorithmParameterSpec
This class specifies the set of parameters used with OAEP Padding, as defined in the PKCS#1 v2.2 standard. Its ASN.1 definition in PKCS#1 standard is described below:RSAES-OAEP-params ::= SEQUENCE { hashAlgorithm [0] HashAlgorithm DEFAULT sha1, maskGenAlgorithm [1] MaskGenAlgorithm DEFAULT mgf1SHA1, pSourceAlgorithm [2] PSourceAlgorithm DEFAULT pSpecifiedEmpty }
whereHashAlgorithm ::= AlgorithmIdentifier { {OAEP-PSSDigestAlgorithms} } MaskGenAlgorithm ::= AlgorithmIdentifier { {PKCS1MGFAlgorithms} } PSourceAlgorithm ::= AlgorithmIdentifier { {PKCS1PSourceAlgorithms} } OAEP-PSSDigestAlgorithms ALGORITHM-IDENTIFIER ::= { { OID id-sha1 PARAMETERS NULL }| { OID id-sha224 PARAMETERS NULL }| { OID id-sha256 PARAMETERS NULL }| { OID id-sha384 PARAMETERS NULL }| { OID id-sha512 PARAMETERS NULL }| { OID id-sha512-224 PARAMETERS NULL }| { OID id-sha512-256 PARAMETERS NULL }, ... -- Allows for future expansion -- } PKCS1MGFAlgorithms ALGORITHM-IDENTIFIER ::= { { OID id-mgf1 PARAMETERS HashAlgorithm }, ... -- Allows for future expansion -- } PKCS1PSourceAlgorithms ALGORITHM-IDENTIFIER ::= { { OID id-pSpecified PARAMETERS EncodingParameters }, ... -- Allows for future expansion -- } EncodingParameters ::= OCTET STRING(SIZE(0..MAX))
Note: the OAEPParameterSpec.DEFAULT uses the following:
message digest -- "SHA-1" mask generation function (mgf) -- "MGF1" parameters for mgf -- MGF1ParameterSpec.SHA1 source of encoding input -- PSource.PSpecified.DEFAULT
- Since:
- 1.5
- See Also:
MGF1ParameterSpec
,PSource
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Field Summary
Fields Modifier and Type Field Description static OAEPParameterSpec
DEFAULT
The OAEP parameter set with all default values.
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Constructor Summary
Constructors Constructor Description OAEPParameterSpec(String mdName, String mgfName, AlgorithmParameterSpec mgfSpec, PSource pSrc)
Constructs a parameter set for OAEP padding as defined in the PKCS #1 standard using the specified message digest algorithmmdName
, mask generation function algorithmmgfName
, parameters for the mask generation functionmgfSpec
, and source of the encoding input PpSrc
.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description String
getDigestAlgorithm()
Returns the message digest algorithm name.String
getMGFAlgorithm()
Returns the mask generation function algorithm name.AlgorithmParameterSpec
getMGFParameters()
Returns the parameters for the mask generation function.PSource
getPSource()
Returns the source of encoding input P.
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Field Detail
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DEFAULT
public static final OAEPParameterSpec DEFAULT
The OAEP parameter set with all default values.
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Constructor Detail
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OAEPParameterSpec
public OAEPParameterSpec(String mdName, String mgfName, AlgorithmParameterSpec mgfSpec, PSource pSrc)
Constructs a parameter set for OAEP padding as defined in the PKCS #1 standard using the specified message digest algorithmmdName
, mask generation function algorithmmgfName
, parameters for the mask generation functionmgfSpec
, and source of the encoding input PpSrc
.- Parameters:
mdName
- the algorithm name for the message digest.mgfName
- the algorithm name for the mask generation function.mgfSpec
- the parameters for the mask generation function. If null is specified, null will be returned by getMGFParameters().pSrc
- the source of the encoding input P.- Throws:
NullPointerException
- ifmdName
,mgfName
, orpSrc
is null.
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Method Detail
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getDigestAlgorithm
public String getDigestAlgorithm()
Returns the message digest algorithm name.- Returns:
- the message digest algorithm name.
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getMGFAlgorithm
public String getMGFAlgorithm()
Returns the mask generation function algorithm name.- Returns:
- the mask generation function algorithm name.
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getMGFParameters
public AlgorithmParameterSpec getMGFParameters()
Returns the parameters for the mask generation function.- Returns:
- the parameters for the mask generation function.
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getPSource
public PSource getPSource()
Returns the source of encoding input P.- Returns:
- the source of encoding input P.
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